CN101741267B - 50A-grade low-voltage high-current power source suitable for integrated circuits - Google Patents

50A-grade low-voltage high-current power source suitable for integrated circuits Download PDF

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Publication number
CN101741267B
CN101741267B CN2009102159717A CN200910215971A CN101741267B CN 101741267 B CN101741267 B CN 101741267B CN 2009102159717 A CN2009102159717 A CN 2009102159717A CN 200910215971 A CN200910215971 A CN 200910215971A CN 101741267 B CN101741267 B CN 101741267B
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diode
transformer
circuit link
switching tube
inductance
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CN101741267A (en
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张波
张桂东
肖文勋
丘东元
赵亮
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South China University of Technology SCUT
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South China University of Technology SCUT
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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
    • Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P80/00—Climate change mitigation technologies for sector-wide applications
    • Y02P80/10—Efficient use of energy, e.g. using compressed air or pressurized fluid as energy carrier

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  • Dc-Dc Converters (AREA)

Abstract

The invention provides a 50A-grade low-voltage high-current power source suitable for integrated circuits, which mainly comprises a charging circuit link, a energy release circuit link, an afterflow circuit link and a energy output circuit link, wherein the charging circuit link comprises a rectifier bridge, a first inductor, a second switching tube and an energy storage capacitor; the energy release circuit link comprises a first switching tube, an energy storage capacitor, a second switching tube, a third diode and a primary winding of a transformer; the afterflow circuit link comprises a first diode, an energy storage capacitor, a second diode, a third diode and the primary winding of the transformer; and the energy output circuit link comprises a secondary winding of the transformer, a fourth diode, a fifth diode and a second inductor. The invention realizes the energy transfer by charging and discharging the energy storage capacitors; the invention only uses two switching tubes, and the voltage stress of the master switching tube is low, thereby being low in cost; the invention regulates the output voltage of the circuit by regulating the duty ratio of the two switching tubes; and the invention also can realize the function of correcting the input power factor.

Description

A kind of 50A grade low-voltage high-current power source that is applicable to integrated circuit
Technical field
The present invention relates to the 50A grade low-voltage and high-current power supply and the low technical field of main switch voltage stress of integrated chips such as similar CPU, DSP, CPLD, FPGA, ARM, all kinds single-chip microcomputer; Be specifically related to a kind of 50A grade low-voltage and high-current that is applicable to integrated circuit, and the low power supply of main switch voltage stress.
Background technology
Along with gradually becoming strong of semiconductor integrated chip function; Required power is increasing, the power supply of the low-voltage and high-current that adopts at present, and general input voltage is 5V, 12V; The power supply more complicated of constructing like this; Cost is also higher, and makes such circuit output current be limited in the following grade of 30A, can't satisfy the needs of practical development; For improving the output current grade, the S-T circuit that Sheppard and Taylor propose has appearred, and as shown in Figure 1, it can reach the 50A current class, and is very high but the voltage stress of its main switch requires, and has improved the cost of power supply.The present invention has solved output current simultaneously and has reached the 50A grade, the problem that the voltage stress of main switch reduces greatly.
Summary of the invention
The objective of the invention is to overcome the deficiency of above-mentioned prior art, a kind of 50A grade low-voltage high-current power source that is applicable to integrated circuit is provided, and the low power supply of main switch voltage stress.The present invention is applicable to that the integrated chip power supply of the multiple CPU of being similar to, DSP, CPLD, FPGA, ARM, all kinds single-chip microcomputer etc. uses; Can be through duty cycle adjustment to switching tube; Realize the adjusting of low-voltage and high-current output; And realize the input power factor correction, and the voltage stress of main switch obviously reduces.The present invention realizes through following technical scheme:
A kind of 50A grade low-voltage high-current power source that is applicable to integrated circuit; Comprise charging circuit link, freewheeling circuit link, energy release circuit link and energy output circuit link; The charging circuit link comprises rectifier bridge, first inductance, second switch pipe and storage capacitor; The energy release circuit link comprises the former limit winding of first switching tube, storage capacitor, second switch pipe, the 3rd diode and transformer; The freewheeling circuit link comprises the former limit winding of first diode, storage capacitor, second diode, the 3rd diode and transformer, and energy output circuit link comprises secondary winding, the 4th diode, the 5th diode and second inductance of transformer.
Entire circuit of the present invention all is with storage capacitor C 1As the center, will be through discharging and recharging of electric capacity being realized the transmission of energy.Entire circuit has only been used two switching tubes, and the voltage stress of switching tube is lower, so the cost the selector switch pipe time will reduce.What power supply of the present invention was exported is 50A grade low-voltage and high-current, is particularly useful for the similarly power supply of integrated chip such as CPU, DSP, CPLD, FPGA, ARM, all kinds single-chip microcomputer.The present invention realizes that through the adjusting to the switching tube duty ratio output voltage of circuit is regulated; Rectifier bridge DC side electric current is interrupted simultaneously, and the automatic floating voltage of inductive current changes, thereby realizes the function that input power factor is proofreaied and correct.
In the above-mentioned 50A grade low-voltage high-current power source that is applicable to integrated circuit, AC power V aWith rectifier bridge B 1Two inputs connect; Rectifier bridge B 1The common cathode output and first inductance L 1An end connect first inductance L 1The other end and the first switching tube Q 1Drain electrode, the first diode D 1Negative electrode, capacitor C 1An end be connected to a bit; Capacitor C 1The other end and the second diode D 2Anode, second switch pipe Q 2Source electrode be connected to a bit; The first switching tube Q 1Source electrode, the second diode D 2Negative electrode and the 3rd diode D 3Anode be connected to a bit the 3rd diode D then jointly 3Negative electrode and transformer T 1The end of the same name of former limit winding connects; Transformer T 1The different name end of former limit winding, second switch pipe Q 2Drain electrode, the first diode D 1Anode and rectifier bridge B 1Common anode output end link to each other; Transformer T 1The different name end and the 4th diode D of secondary winding 4Negative electrode be connected the 4th diode D 4Anode and the 5th diode D 5Anode, second inductance L 2One end is connected in a bit; Second inductance L 2The other end is connected with load one end, the other end of load, the 5th diode D 5Negative electrode be connected in transformer T jointly 1The different name end of secondary winding.
In the above-mentioned 50A grade low-voltage high-current power source that is applicable to integrated circuit, rectifier bridge B 1, first inductance L 1, transformer T 1, the first switching tube Q 1, second switch pipe Q 2, storage capacitor C 1, the first diode D 1, the second diode D 2With the 3rd diode D 3Both constitute the input power factor correcting circuit, constituted reduction voltage circuit again, thereby reduced by the first switching tube Q 1With second switch pipe Q 2Voltage stress.
Compared with prior art the present invention has following advantage: along with gradually becoming strong of semiconductor integrated chip function; Required power is increasing; The power supply of the low-voltage and high-current that adopts at present, general input voltage is 5V, 12V, like this power supply more complicated of structure; Cost is also higher, and makes such circuit output current be limited in the needs that the following grade of 30A can't satisfy practical development; For improving the output current grade, the S-T circuit that Sheppard and Taylor propose has appearred, and as shown in Figure 1, it can reach the 50A current class, and is very high but the voltage stress of its main switch requires, and has improved the cost of power supply.The present invention is the 50A grade low-voltage and high-current power supply that is applicable to integrated chips such as CPU, DSP, CPLD, FPGA, ARM, various types of single-chip microcomputers, and is as shown in Figure 5, is the analogous diagram of output current of the present invention.Under identical civil power (alternating current 220V) input; Under the condition of the main devices initial condition identical (comprising resistance) among Fig. 1 and Fig. 2, the present invention (Fig. 2) main switch voltage stress is lower, and is low to the switching tube parameter request; Reduced cost; As shown in Figure 6, the figure of top is the main switch voltage stress figure of Fig. 1 circuit, and the figure of below is the voltage stress figure of the main switch of the present invention (Fig. 2) under the same terms and parameter.
Description of drawings
Fig. 1 is the higher S-T circuit diagram of main switch voltage stress in the prior art.
Fig. 2 is the instance graph that is applicable to the 50A grade low-voltage high-current power source of integrated circuit in the specific embodiment of the invention.
Fig. 3 is the process chart that is applicable to the 50A grade low-voltage high-current power source of integrated circuit shown in Figure 2.
Fig. 4 is the main voltage current waveform of 50A grade low-voltage high-current power source in two switch periods that is applicable to integrated circuit shown in Figure 2.
Fig. 5 is that the general circuit output current can only reach below the 30A under identical civil power (alternating current 220V) input, and the present invention (Fig. 2) output reaches the output current figure of 50A grade.
Fig. 6 is under identical civil power (alternating current 220V) input and device parameters, the voltage stress map of the main switch among Fig. 1 and Fig. 2, and wherein a is the voltage of main switch among Fig. 1, and b is the voltage of main switch among Fig. 1, and the unit of ordinate is V.
Embodiment
Below in conjunction with accompanying drawing practical implementation of the present invention is further described.
With reference to figure 2,, be applicable to that the low power supply of 50A grade low-voltage and high-current and the main switch voltage stress of integrated circuit is with inductance L as execution mode 1, switching tube Q 2With storage capacitor C 1As the charging circuit link; With the first switching tube Q 1With second switch pipe Q 2, the 3rd diode D 3, storage capacitor C 1With transformer T 1Discharge link as energy; The first diode D 1, the second diode D 2, the 3rd diode D 3, storage capacitor C 1With transformer T 1As the charging link; Transformer T 1Secondary winding, the 4th diode D 4, the 5th diode D 5And inductance L 2Become the energy output element, give load energy delivery.Entire circuit all is with storage capacitor C 1As the center, will be through discharging and recharging of electric capacity being realized the transmission of energy.AC power V aWith rectifier bridge B 1Two inputs connect; Rectifier bridge B 1The common cathode output and first inductance L 1An end connect first inductance L 1The other end and the first switching tube Q 1Drain electrode, the first diode D 1Negative electrode, capacitor C 1An end be connected to a bit; Capacitor C 1The other end and the second diode D 2Anode, second switch pipe Q 2Source electrode be connected to a bit; The first switching tube Q 1Source electrode, the second diode D 2Negative electrode and the 3rd diode D 3Anode be connected to a bit the 3rd diode D then jointly 3Negative electrode and transformer T 1The end of the same name of former limit winding connects; Transformer T 1The different name end of former limit winding, second switch pipe Q 2Drain electrode, the first diode D 1Anode and rectifier bridge B 1Common anode output end link to each other; Transformer T 1The different name end and the 4th diode D of secondary winding 4Negative electrode be connected the 4th diode D 4Anode and the 5th diode D 5Anode, second inductance L 2One end is connected in a bit; Second inductance L 2The other end is connected with load one end, the other end of load, the 5th diode D 5Negative electrode be connected in transformer T jointly 1The different name end of secondary winding.
Fig. 3 has provided the circuit working process of this execution mode, and Fig. 4 has provided main voltage waveform of the present invention.In a switch periods, the course of work of the present invention is following:
Stage 1 (t 0～t 1), like Fig. 3 a: the first switching tube Q 1With second switch pipe Q 2Conducting simultaneously, the first diode D at this moment 1With the second diode D 2Be in off state.Capacitor C 1Through the first switching tube Q 1, second switch pipe Q 2With the 3rd diode D 3To transformer T 1Former limit winding charge C 1Release energy; Transformer T 1Secondary winding through the 4th diode D 4With second inductance L 2Give the load transfer energy.
Stages 2 (t 1～t 2), like Fig. 3 b: the first switching tube Q 1With second switch pipe Q 2Turn-off simultaneously, at this moment the first diode D 1With the second diode D 2Be in conducting state.Transformer T 1Former limit winding through the first diode D 1, the second diode D 2, the 3rd diode D 3To capacitor C 1The energy feedback; Transformer T 1Secondary winding through the 4th diode D 4With second inductance L 2Give the load transfer energy.
Stages 3 (t 2～t 3), like Fig. 3 c: the first switching tube Q 1With second switch pipe Q 2Turn-off, at this moment the first diode D 1Turn-off and the second diode D 2Open-minded.Power supply V aThrough rectifier bridge B 1After the rectification, through first inductance L 1, the second diode D 2, the 3rd diode D 3, simultaneously to transformer T 1Former limit winding and capacitor C 1Charge; Transformer T 1Secondary winding through the 4th diode D 4With second inductance L 2Give the load transfer energy.
Stages 4 (t 2～T), like Fig. 3 d: the first switching tube Q 1With second switch pipe Q 2Turn-off, at this moment the first diode D 1With the second diode D 2Be in off state.Transformer T 1Former limit does not have the conducting loop, second inductance L 2Through the 5th diode D 5Afterflow is transmitted energy and is given load.
The present invention is the 50A grade low-voltage and high-current power supply that is applicable to integrated chips such as CPU, DSP, CPLD, FPGA, ARM, various types of single-chip microcomputers, and is as shown in Figure 5, is the analogous diagram of output current of the present invention.Under identical civil power (alternating current 220V) input, as shown in Figure 6, top a is main switch (the first switching tube Q of Fig. 1 circuit 1) voltage stress figure, below b is main switch (the first switching tube Q of the present invention (Fig. 2) under the same terms and parameter 1) voltage stress figure.It is thus clear that the present invention (Fig. 2) main switch voltage stress is lower, and is low to the switching tube parameter request, reduced cost.

Claims (2)

1. a 50A grade low-voltage high-current power source that is applicable to integrated circuit is characterized in that comprising charging circuit link, freewheeling circuit link, energy release circuit link and energy output circuit link, and the charging circuit link is by rectifier bridge (B 1), the first inductance (L 1), second switch pipe (Q 2) and storage capacitor (C 1) constitute, the energy release circuit link is by the first switching tube (Q 1), said storage capacitor (C 1), said second switch pipe (Q 2), the 3rd diode (D 3) and transformer (T 1) former limit winding constitute, the freewheeling circuit link is by the first diode (D 1), said storage capacitor (C 1), the second diode (D 2), said the 3rd diode (D 3) and said transformer (T 1) former limit winding constitute, energy output circuit link is by said transformer (T 1) secondary winding, the 4th diode (D 4), the 5th diode (D 5) and the second inductance (L 2) constitute; AC power (V a) and said rectifier bridge (B 1) two inputs connect; Said rectifier bridge (B 1) common cathode output and the said first inductance (L 1) an end connect the said first inductance (L 1) the other end and the said first switching tube (Q 1) drain electrode, the said first diode (D 1) negative electrode and said storage capacitor (C 1) an end be connected; Said storage capacitor (C 1) the other end and the second diode (D 2) anode and second switch pipe (Q 2) source electrode be connected; The said first switching tube (Q 1) source electrode, the said second diode (D 2) negative electrode and said the 3rd diode (D 3) anode be connected to a bit said the 3rd diode (D jointly 3) negative electrode and transformer (T 1) end of the same name of former limit winding connects; Transformer (T 1) the different name end of former limit winding, said second switch pipe (Q 2) drain electrode, the said first diode (D 1) anode and said rectifier bridge (B 1) common anode output end link to each other; Said transformer (T 1) the different name end and the 4th diode (D of secondary winding 4) negative electrode be connected said the 4th diode (D 4) anode and said the 5th diode (D 5) anode, the said second inductance (L 2) end is connected in a bit; The said second inductance (L 2) other end is connected the other end of load, said the 5th diode (D with load one end 5) negative electrode be connected in said transformer (T jointly 1) the end of the same name of secondary winding.
2. a kind of 50A grade low-voltage high-current power source that is applicable to integrated circuit according to claim 1 is characterized in that said rectifier bridge (B 1), the first inductance (L 1), transformer (T 1), the first switching tube (Q 1), second switch pipe (Q 2), storage capacitor (C 1), the first diode (D 1), the second diode (D 2) and the 3rd diode (D 3) both constituted the input power factor correcting circuit, constitute reduction voltage circuit again, thereby reduce the said first switching tube (Q 1) and second switch pipe (Q 2) voltage stress.
CN2009102159717A 2009-12-31 2009-12-31 50A-grade low-voltage high-current power source suitable for integrated circuits Expired - Fee Related CN101741267B (en)

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Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2742672Y (en) * 2004-07-15 2005-11-23 中国人民解放军国防科学技术大学 Soft switch changer suitable for sensitive load
CN201629686U (en) * 2009-12-31 2010-11-10 华南理工大学 50A-rating low-voltage high-current power source applicable to integrated circuits

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2742672Y (en) * 2004-07-15 2005-11-23 中国人民解放军国防科学技术大学 Soft switch changer suitable for sensitive load
CN201629686U (en) * 2009-12-31 2010-11-10 华南理工大学 50A-rating low-voltage high-current power source applicable to integrated circuits

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